The document discusses different theories of capital structure: 1. The traditional approach argues that an optimal capital structure exists where the weighted average cost of capital (WACC) is minimized, maximizing firm value. 2. The net income (NI) approach argues that greater debt use lowers WACC and increases firm value, while the net operating income (NOI) approach argues capital structure does not impact WACC or value. 3. Modigliani-Miller's first proposition agrees with NOI when there are no corporate taxes, but their second proposition recognizes capital structure impacts WACC and value when taxes exist due to interest tax deductibility.

1. Capital Structure
Theories
Prof. Dhaval Bhatt

2. Capital Structure
• Capital structure can be defined as the mix
of owned capital and borrowed capital
• Maximization of shareholders’ wealth is
prime objective of a financial manager.

3. Capitalization and Capital Structure
▪ Capitalization refers to the total amount
of long-term funds employed by the
firm.
▪ Capital structure signifies the kinds of
securities and their proportion in the
total capitalization of a firm.

4. Financial Structure
V/s Capital Structure
• Financial structure is different from capital structure. It
means the composition of the entire liabilities side of the
balance sheet.
• It shows the way in which the firm’s assets are financed.
Financial structure includes long-term as well as short-term
sources of finance.
• Capital structure signifies the proportion of long-term
sources of finance in the capitalization of the firm.
• It is represented by shareholders’ funds and long-term
loans. Capital structure is a part of the financial structure.

5. Components of Capital Structure
The capital structure of a new company generally
includes the following:
• Equity shares
• Preference shares
• Debentures or Bonds
• Long-term loans

6. Capital Structure Theories
The four major theories of approaches which explain
the relationship between capital structure, cost of
capital and valuation of firm are:
• The Traditional Approach
• Net Income (NI) Approach
• Net Operating Income (NOI) Approach
• Modigliani-Miller (MM) Approach

7. ❖ Firms use only two sources of funds – Equity & Debt.
❖ No change in investment decisions of the firm, i.e. no change in total
assets.
❖ 100 % dividend payout ratio, i.e. no retained earnings.
❖ Business risk of firm is not affected by the financing mix.
❖ No corporate or personal taxation.
❖ Investors expect future profitability of the firm.
ASSUMPTIONS

8. A) Net Income Approach (NI)
Relationship between capital structure and
value of the firm.
▪ Its cost of capital (WACC), and thus directly affects the
value of the firm.
▪ NI approach assumptions –
o NI approach assumes that a continuous increase in debt does
not affect the risk perception of investors.
o Cost of debt (Kd) is less than cost of equity (Ke) [i.e. Kd < Ke ]
o Corporate income taxes do not exist.

9. A) Net Income Approach (NI)
• This approach was identified by David Durand.
• According to this approach, capital structure has;
relevance, and a firm can increase the value of the
firm and minimize the overall cost of capital by
employing debt capital in its capital structure.
According to this theory, greater the debt capital
employed, lower shall be the overall cost of capital
and more shall be the value of the firm.
• As the proportion of debt (Kd) in capital structure
increases, the WACC (Ko) reduces.

10. B) Net Operating Income (NOI)
▪ Net Operating Income (NOI) approach is the exact
opposite of the Net Income (NI) approach.
▪ As per NOI approach, value of a firm is not dependent
upon its capital structure.
▪ Assumptions –
o WACC is always constant, and it depends on the business risk.
o Value of the firm is calculated using the overall cost of capital
i.e. the WACC only.
o The cost of debt (Kd) is constant.
o Corporate income taxes do not exist.

11. B) Net Operating Income (NOI)
▪ NOI propositions (i.e. school of thought) –
o The use of higher debt component (borrowing) in the
capital structure increases the risk of shareholders.
o Increase in shareholders’ risk causes the equity
capitalization rate to increase, i.e. higher cost of equity
(Ke)
o A higher cost of equity (Ke) nullifies the advantages
gained due to cheaper cost of debt (Kd )
o In other words, the finance mix is irrelevant and does
not affect the value of the firm.

12. B) Net Operating Income (NOI)
▪ This approach is also suggested by David
Durand. This represents another extreme view
that capital structure and value of the firm are
irrelevant.
▪ The capital structure of the firm does not
influence cost of capital and value of the firm.
▪ Cost of capital (Ko) is constant.
▪ As the proportion of debt increases, (Ke)
increases.
▪ No effect on total cost of capital (WACC)

13. C) Modigliani – Miller Model (MM)
▪ MM approach supports the NOI approach, i.e. the capital
structure (debt-equity mix) has no effect on value of a
firm.
• MODIGLIANI- MILLER explain the relationship
between capital structure, cost of capital and value of the
firm under two conditions:
1. When there is no corporate taxes
2. When there is corporate taxes

14. C) Modigliani – Miller Model (MM)
PROPOSITION I
WHEN THERE IS NO CORPORATE TAXES
• The MODIGLIANI- MILLER Approach is identical to
NOI approach when there are no corporate taxes.
• MODIGLIANI- MILLER argue that in the absence of
taxes, the cost of capital and value of the firm are not
affected by capital structure or debt-equity mix.

15. Modigliani – Miller Model (MM)
Assumption
The MM hypothesis is based on the following
assumption
• There is perfect market. It implies that
(a). Investors are free to buy and sell securities:
(b). They can borrow freely on the same term
as the firms do;
(c). Investors act in a rational manner.

16. Modigliani – Miller Model (MM)
Assumption
• There are no corporate taxes.
• There are no transaction costs.
• The payout is 100 per cent. That is, all the
earnings are distributed to shareholders.
• Firms can be grouped into homogeneous
risk classes.

17. C) Modigliani – Miller Model (MM)
PROPOSITION I
WHEN THERE ARE CORPORATE TAXES:
• Modigliani an Miller have recognized that capital structure
would affect the cost of capital an value of the firm, when
there are corporate taxes.
• If a firm uses debt in its capital structure, the cost of
capital will decline an market value will increases. This is
because of the deductibility of interest charges for
computation of tax

18. Criticism of MM Approach
1. Markets are not perfect
2. Higher interest for individuals
3. Personal leverage is no substitute for corporate
leverage
4. Transaction costs
5. Corporate taxes

19. D) Traditional Approach
▪ The NI approach and NOI approach hold extreme views on
the relationship between capital structure, cost of capital
and the value of a firm.
▪ Traditional approach (‘intermediate approach’) is a compromise
between these two extreme approaches.
▪ Traditional approach confirms the existence of an optimal
capital structure; where WACC is minimum and value is the
firm is maximum.
▪ As per this approach, a best possible mix of debt and equity
will maximize the value of the firm.

20. D) Traditional Approach
The approach works in 3 stages –
1) Value of the firm increases with an increase in borrowings
(since Kd < Ke). As a result, the WACC reduces gradually.
This phenomenon is up to a certain point.
2) At the end of this phenomenon, reduction in WACC
ceases and it tends to stabilize. Further increase in
borrowings will not affect WACC and the value of firm
will also stagnate.
3) Increase in debt beyond this point increases shareholders’
risk (financial risk) and hence Ke increases. Kd also rises due
to higher debt, WACC increases & value of firm decreases.

21. D) Traditional Approach
▪ Cost of capital (Ko) is reduces initially.
▪ At a point, it settles, but after this point, (Ko)
increases, due to increase in the cost of
equity. (Ke)